AT&T has Cricket, Sprint has Boost Mobile, T-Mobile has GoSmartMobile and Verizon has Total Wireless. The sub-brands use the same towers and systems as the major brands, but at a lower price and with no contract. Although you should check first, the parent network phone should be compatible with the sub-brand service.

In many areas where they don't have enough of there own they do roam onto At&t, cellularone, and any other GSM carrier that may be in that area. They never use verizon or sprint towers as they are CDMA carriers. Different technology. T-Mobile has a LOT more cell sites than just the ones on their own towers.

The new entity was headed by co-CEOs Charles Lee, formerly the CEO of GTE, and Bell Atlantic CEO Ivan Seidenberg. Upon the acquisition, Verizon became the largest local telephone company in the United States, operating 63 million telephone lines in 40 states.

MetroPCS (stylized as metroPCS) is a prepaid wireless service in the United States that is part of T-Mobile US, Inc.. MetroPCS provides nationwide talk, text, and data depending on the plan services using GSM, HSPA, HSPA+ and 4G LTE networks.

Straight also uses At&t towers. The boxes for those phones have GSM on the front, the verizon ones have CDMA or nothing. It's owned by TracFone. If the phone has a C at the end of the name of the phone (after the number) it works on Verizon.

The simplest reason to unlock your phone is to use it on another GSM network. U.S. GSM virtual carriers compatible with unlocked phones include Cricket, MetroPCS, Simple Mobile, Straight Talk, H2O Wireless, Black Wireless, Ready SIM, and many others. Large CDMA carriers, in general, do not accept unlocked phones.

Services and plans. The company advertises unlimited talk, text, and international text starting at $25.00. The company features 4G LTE plans using T-Mobile's LTE network bands. SIMPLE Mobile also offers international calling plans, wireless broadband, and service plans specifically for Blackberry devices.

TracFone Wireless operates as a mobile virtual network operator (MVNO), holding agreements with the United States' largest wireless network operators to provide service using their networks, including Verizon Wireless, AT&T Mobility, T-Mobile US, Sprint Corporation, and U.S. Cellular.

TracFone Wireless operates as a mobile virtual network operator (MVNO), holding agreements with the United States' largest wireless network operators to provide service using their networks, including Verizon Wireless, AT&T Mobility, T-Mobile US, Sprint Corporation, and U.S. Cellular.

A tracphone, or TracFone, is a prepaid phone that gives you the accessibility of a contract plan without the commitment. Tracphones have become much more popular in the past few months as more people are finally ending their two year contracts with their cell phone providers and switching to prepaid plans.

Straight also uses At&t towers. The boxes for those phones have GSM on the front, the verizon ones have CDMA or nothing. It's owned by TracFone. If the phone has a C at the end of the name of the phone (after the number) it works on Verizon.

Compatible phones include: GSM Unlocked phones, AT&T Compatible phones, T-Mobile Compatible phones, Sprint Compatible Phones, and some other CDMA Technology Compatible phones. In the United States, two of the four leading mobile network operators use GSM. How do I know if I will need a Straight Talk BYOP SIM?

In the US, Sprint, Verizon and US Cellular use CDMA. AT&T and T-Mobile use GSM. Most of the rest of the world uses GSM. The global spread of GSM came about because in 1987, Europe mandated the technology by law, and because GSM comes from an industry consortium.

The phone sold by Walmart for use on StraightTalk is the A1429 CDMA. As a rule, you can not use a CDMA iPhone on any CDMA carrier other than the one it was originally sold for. if the straight talk iphone is GSM A1429 using CDMA 3G netwrok, I can switch to Tmobile LET 4G network when I move.

Can you use an AT&T phone with Sprint?

There's nothing that can be done to make AT&T unlocked phones on Verizon or Sprint networks. Any AT&T that has been unlocked will be classified as 'SIM-unlocked' so it will only work on GSM carriers, such as T-Mobile's GSM 2G. It won't work on T-Mobile's LTE, and the same principle applies to all MVNOs.

Can you get a Verizon phone to work with AT&T?

Verizon is a CDMA carrier, and operates on a different technology than AT&T and T-Mobile (which are GSM). However, you should still be able to use your unlocked Verizon 4G LTE device on AT&T or T-Mobile, as most handsets will be compatible with both carriers' LTE bands.

Can you put a tmobile sim card in an AT&T phone?

Both carriers run their networks on GSM technology, so once your phone is unlocked, just pop in your new T-Mobile SIM card and you'll be up and running. AT&T and T-Mobile both use Band 4 for their LTE service, so 4G LTE devices should be able to access the network without issue.

Can you unlock an AT&T Iphone?

If you buy an iPhone from AT&T, it will be "locked" to AT&T's network. That means if you try to put in a T-Mobile SIM, it won't work. Same with an international SIM if you're traveling. Just because you're locked, though, doesn't mean you can't unlock.

In the USA, Boost is a MVNO (Mobile virtual network operator) for Sprint, which makes it a CDMA2000 3G service. In Australia, they partner with Telstra, so this is UMTS (W-CDMA), i.e. the 3G technology used most places around the World.

Can you take a Verizon phone to Sprint?

CDMA and GSM are the two radio networks used by wireless carriers and present in cell phones. As such, it's easier to take a phone from Sprint to Verizon than it is to take a phone from Sprint to AT&T, because in the former case you're not jumping network types.

Is Metro PCS a GSM network?

This is significant because it marks the first time that MetroPCS, which was CDMA-only before the merger, is using T-Mobile's GSM network. The carrier is accepting unlocked iPhones, Android phones, Windows phones, and certain feature phones, but not BlackBerrys, tablets, or hotspots.

AT&T uses GSM technology, just like T-Mobile. Verizon and Sprint, on the other hand, use CDMA, which stands for Code Division Multiple Access. All it means is that Verizon can pile on several people to use its network at once.

Is Virgin Mobile a GSM phone?

Virgin Mobile provides CDMA devices in the US, meaning phones don't work based on a SIM card, as opposed to GSM carriers (e.g. AT&T and T-mobile). CDMA phones usually have SIM slots, but they support only foreign GSM networks.

Can you use any phone with Sprint?

Be sure this unlocked phone is a part of the CDMA network or it won't work with Sprint. Most third parties will tell you ahead of time if the phone can or can't be used on the Sprint network. Many phones that use traditional SIM cards are part of the GSM network, which includes AT&T, Cingular, and T-Mobile.